ABAP Select data from SAP table ISI_SCHEDLINE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ISI_SCHEDLINE table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ISI_SCHEDLINE. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ISI_SCHEDLINE table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ISI_SCHEDLINE TYPE STANDARD TABLE OF ISI_SCHEDLINE,
      WA_ISI_SCHEDLINE TYPE ISI_SCHEDLINE,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ISI_SCHEDLINE> TYPE ISI_SCHEDLINE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ISI_SCHEDLINE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ISI_SCHEDLINE
  INTO TABLE IT_ISI_SCHEDLINE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISI_SCHEDLINE
*  INTO TABLE @DATA(IT_ISI_SCHEDLINE2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ISI_SCHEDLINE INDEX 1 INTO DATA(WA_ISI_SCHEDLINE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ISI_SCHEDLINE ASSIGNING <ISI_SCHEDLINE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISI_SCHEDLINE>-MANDT = 1.
<ISI_SCHEDLINE>-EBELN = 1.
<ISI_SCHEDLINE>-EBELP = 1.
<ISI_SCHEDLINE>-ABART = 1.
<ISI_SCHEDLINE>-ABRUF = 1.

ENDLOOP.

LOOP AT IT_ISI_SCHEDLINE INTO WA_ISI_SCHEDLINE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISI_SCHEDLINE-ETENR, sy-vline,
  WA_ISI_SCHEDLINE-EINDT, sy-vline,
  WA_ISI_SCHEDLINE-LPEIN, sy-vline,
  WA_ISI_SCHEDLINE-UZEIT, sy-vline,
  WA_ISI_SCHEDLINE-MENGE, sy-vline,
  WA_ISI_SCHEDLINE-ETART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISI_SCHEDLINE you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ISI_SCHEDLINE TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ISI_SCHEDLINE INTO WA_ISI_SCHEDLINE.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISI_SCHEDLINE-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISI_SCHEDLINE-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ISI_SCHEDLINE-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISI_SCHEDLINE-UNIT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ISI_SCHEDLINE_STR, 
MANDT TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ABART TYPE STRING,
ABRUF TYPE STRING,
ETENR TYPE STRING,
EINDT TYPE STRING,
LPEIN TYPE STRING,
UZEIT TYPE STRING,
MENGE TYPE STRING,
ETART TYPE STRING,
SERNR TYPE STRING,
ESTKZ TYPE STRING,
AMENG TYPE STRING,
WEMNG TYPE STRING,
EEIND TYPE STRING,
DATE_CATEGORY_DESC TYPE STRING,
OPEN_AMOUNT TYPE STRING,
UNIT TYPE STRING,
CUM_SHD_QTY TYPE STRING,
CHG_QTY TYPE STRING,
EXTDATUM TYPE STRING,
EXTPERIOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISI_SCHEDLINE_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ISI_SCHEDLINE_STR-MANDT sy-vline 
WA_ISI_SCHEDLINE_STR-EBELN sy-vline 
WA_ISI_SCHEDLINE_STR-EBELP sy-vline 
WA_ISI_SCHEDLINE_STR-ABART sy-vline 
WA_ISI_SCHEDLINE_STR-ABRUF sy-vline 
WA_ISI_SCHEDLINE_STR-ETENR sy-vline 
WA_ISI_SCHEDLINE_STR-EINDT sy-vline 
WA_ISI_SCHEDLINE_STR-LPEIN sy-vline 
WA_ISI_SCHEDLINE_STR-UZEIT sy-vline 
WA_ISI_SCHEDLINE_STR-MENGE sy-vline 
WA_ISI_SCHEDLINE_STR-ETART sy-vline 
WA_ISI_SCHEDLINE_STR-SERNR sy-vline 
WA_ISI_SCHEDLINE_STR-ESTKZ sy-vline 
WA_ISI_SCHEDLINE_STR-AMENG sy-vline 
WA_ISI_SCHEDLINE_STR-WEMNG sy-vline 
WA_ISI_SCHEDLINE_STR-EEIND sy-vline 
WA_ISI_SCHEDLINE_STR-DATE_CATEGORY_DESC sy-vline 
WA_ISI_SCHEDLINE_STR-OPEN_AMOUNT sy-vline 
WA_ISI_SCHEDLINE_STR-UNIT sy-vline 
WA_ISI_SCHEDLINE_STR-CUM_SHD_QTY sy-vline 
WA_ISI_SCHEDLINE_STR-CHG_QTY sy-vline 
WA_ISI_SCHEDLINE_STR-EXTDATUM sy-vline 
WA_ISI_SCHEDLINE_STR-EXTPERIOD sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.